A ball A of mass 1kg

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A ball A of mass 1kg , moving with a speed of 12m/s , collides obliquely and elasticity with another ball B which was initially at rest. Ball A then moves off at the right angle to its initial direction with a speed of 5m/s. The momentum of ball B after the collision is
22
Oct
A ball A of mass 1kg , moving with a speed of 12m/s , collides obliquely and elasticity with another ball B which was initially at rest. Ball A then moves off at the right angle to its initial direction with a speed of 5m/s. The momentum of ball B after the collision is A [...]
Posted in: Cengage NEET by C.P Singh , Chapter 10 - COM, Momentum and Collision , Part 1 ,
Tags: A ball A of mass 1kg , A neutron collides head-on and elasticity with an atom of mass number A , moving with a speed of 12m/s , which is initially at rest. The fraction of kinetic energy retained by neutron is ,